I hope you can find a wonderful new opportunity to help and grow. It just sounds like she has it together enough to give you space... and her space.
When my daughter got married and had her baby, she was the only family left in town. She told me I wasn't suppose to call at certain times. I just told her she could call me anytime any place and didn't make a big deal of it. But I respected her wishes.... It came from a pre marriage couselor after all. Your daughter could be getting information from a counselor... and stretching ehr wings. I would jsut let her know you love her always, and a mother always lovee the most ( ha ha) This always gets my daughter. She says I love you, I say I love you more. Like it is a competition. Love is after all being willing and doing the taking care of and contributing to the happiness and welfare of others. IT isn't a feeling. So the question is.. just is what is best for our children. Well I am just western enough to believe it is to be self-determining... cutting the apron strings... finding their own refridgerator, learning to take care of their own family, their way, with all goodness. Sometimes it includes us, sometimes it doesn't...
Please enjoy this time in your life, don't look back and feel bad about what you did... you sacraficed that is love... now look forward not back.
And remind me (and other empty nest mom's) of these words often in your prayers..May we trust that our paths is directed in Love.